Gear Calculators: Free Ratio, Speed & Torque Design Tools
Design efficient gear systems with our free online gear calculators. Whether you are calculating the speed reduction ratio for a spur gear pair, determining torque multiplication in a worm drive, or sizing a planetary gear set for compact power transmission, these tools deliver precise results instantly. Enter your input speed, number of teeth on each gear, or desired output ratio to receive gear ratio, output RPM, torque change, and center distance values. Each calculator includes module and diametral pitch selection, contact ratio verification, backlash estimation, and efficiency factors for real-world mechanical design. Mechanical engineers, automotive designers, and robotics specialists use these tools to optimize gear trains for speed, torque, or precision positioning. From simple two-gear reductions to complex multi-stage planetary systems, our gear calculators cover every power transmission need. No signup required—access from any device and design reliable gear systems with confidence.
-
Geneva Drive Mechanism Calculator
Calculate rotation angle, indexing step, and angular velocity of Geneva drive mechanisms. Step-by-step solutions with SI units and velocity ratios included.
-
Gear Ratio Calculator
Calculate gear ratios, output speed, torque, and angular velocity for spur, bevel, or planetary gears. Step-by-step solutions with SI units included.
-
Spur Gear Design Calculator
Design spur gears by calculating gear ratio, number of teeth, pitch circle diameter, module, and center distance. Step-by-step formulas included.
-
Helical Gear Design Calculator
Design helical gears by calculating gear ratio, number of teeth, helix angle, module, pitch circle diameter, and center distance. Step-by-step formulas included.
-
Worm Gear Design Calculator
Design worm gears by calculating gear ratio, number of teeth, module, pitch diameter, lead angle, and center distance. Step-by-step formulas included.
-
Bevel Gear Design Calculator
Design bevel gears by calculating gear ratio, number of teeth, module, pitch diameter, and shaft angle. Step-by-step formulas included for accurate gear design.
-
Sponsored
-
Gear Ratio Calculator
Calculate gear ratios, speed ratios, and mechanical advantage for spur, helical, and bevel gears. Step-by-step solutions for engineering and mechanical design.